Is there a way to increment each result of a loop by 2 each time? So it should increase the values by 2, then 4, then 6... So if the first result is 2, it should be 2*2=4 But the second result sho... More on stackoverflow.com

The first line sets the value to 0 (obviously). Line 2 says "Return the value of counter, then add 1 to it" Line 3 says "Add 1 to the value of counter, then return the value of counter" So it becomes: 0 + 1 + 1 = 2 Notice the difference between the two. In the first line, counter's value is returned FIRST, then the increment occurs. In the second line, the value is incremented first. Try this: let counter = 0; console.log(counter++); // the output will be 0! counter = 0; console.log(++counter); // the output will be 1! This works because if the "++" is placed after the variable, the variable value is returned before the increment is applied. On the other hand, placing it before the variable increments the variable before it is returned. You don't see it in your code because you're not examining the value at each step. If you did this: let counter=0; console.log(counter++); console.log(++counter); alert(counter); Your output will be 0, then 2, and the alert will be 2. More on reddit.com

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make easier to read · See this post to find the backtick on your keyboard. More on forum.freecodecamp.org

In a for(initialization; condition; increment) loop, the "initialization" code is always executed, before anything else happens. Then the loop begins. The loop is equivalent to a while loop in that there is a "condition", and this condition is tested before every iteration -- including the first iteration. (This means your for or while loop might never execute the body of the loop, which is correct.) At the end of the loop body, or the beginning of every iteration except the first, the "increment" part is executed. Thus, the increment does not run before the first time, but does run every other time. The use of a continue statement to advance to the next iteration through the loop will run the increment part. Simplified, it looks like this: initialization part goto condition top-of-loop: body of loop /* continue stmt */ goto end-of-body /* break stmt */ goto break end-of-body: increment part condition: evaluate condition part if truthy goto top-of-loop break: whatever code is after your for loop Note here that truthy in C has a particular meaning: non-zero. Any "condition" type test will compare the result of a contained expression against zero. A zero is considered false, and any value other than zero is considered true. "1" is true. "1000000" is true. "6.02E+23" is true. "&main" is true. "NaN" is true. "Inf" is true. "-Inf" is true. I honestly do not know if -0 is true or not, on a sign+magnitude CPU. Yes, there is a boolean type. But the boolean type was added much, much, much later. Before there was a boolean type, everything was int, and so the foundation of the language assumes that the truthiness of int value: 0 vs. non-0, drives everything. More on reddit.com